Here is a nice piece of a fantastic Rokycany concretion with servile specimens of Placoparia. The Rokycany bowls are known for their sparely fossil content. Supposedly only one of one hundred concretions really contains a nice fossil. | |||
Location: | Rokycany Osek, Barrandian area, Czech Republic | ||
Size trilobite: | largest, about 8 mm long | ||
Age: | Middle Ordovician, Llandeilo, ¦árka Formation (About 464 mill. Years old) |